According to the journal article, they had a control group that didn't receive hearing aids. Also, all the participants in the study had hearing loss. "Partici

According to the journal article, they had a control group that didn't receive hearing aids. Also, all the participants in the study had hearing loss. "Participants were randomly assigned (1:1) to a hearing intervention (audiological counselling and provision of hearing aids) or a control intervention of health education (individual sessions with a health educator covering topics on chronic disease prevention) and followed up every 6 months." from https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(23)01406-X/fulltext https://www.thelancet.com/journals/lancet/article/PIIS0140-6...